/*
 * Copyright 2013 Krzysztof Smigielski
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.nilcaream.dirstore.core.common;

import java.io.IOException;
import java.io.InputStream;
import java.util.Arrays;

/**
 * TODO
 * <p/>
 * Krzysztof Smigielski 7/7/13 1:19 PM
 */
class FileTrimmer {

    public byte[] trim(InputStream inputStream, int size) throws IOException {
        byte[] data = new byte[size];
        int bytesRead = inputStream.read(data);
        if (bytesRead == -1) {
            data = new byte[]{};
        } else if (bytesRead < data.length) {
            data = Arrays.copyOf(data, bytesRead);
        }
        return data;
    }
}
